Skeleton metal element for reenforced-concrete columns



Dec. 20, 1927.

Filed Jan. 30. 1926 3 Sheets-Sheet 1 Dec. 20, 1927.

S. MACOMBER SKELETON METAL ELEMENT FOR REENFORCED CONCRETE COLUMNS Filed Jan. so. 1926 3 Sheets-Sheet 2 JVVEIVTUR; firAlvzfiy MACO/ MER av M a A NEK Dec. 20, 1927.

S.MACOMB ER SKELETON METAL ELEMENT FOR REENFORCED CONCRETE COLUMNS Filed Jan. 30, 1926 3 Sheets-Sheet 3 fit,

RNE

' Wl/ENTOR firm/vim Mconaze STANLEY MACOMBER, OF MASSILLON, OHIO, ASSIGNOR TO THE MACOMBER STEEL COMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

SKELETON METAL ELEMENT FOR REENFORCED-CONCRETE COLUMNS.

Application filed January 30, 1926. Serial No. 84,821.

My invention relates to structural elements and particularly to a skeleton metal element adaptable for use as a core for reenforced concrete columns of diflerent cross-sections, The invention is designed to provide a maximum area of column by the use of a minimum amount of steel in the skeleton support, thus efl'ecting a great saving in steel. A further saving is effected by obviating the necessity of using the usual concrete pouring forms.

The annexed drawings and the following description set forth in detail certain means embodying my invention, such means disclosing, however, but a few of the various forms by which the principle of the invention may be illustrated.

In said annexed drawings:

Figure 1 represents a broken perspective view of a complete column of rectangular cross-section, the metal reenforcement of which comprises one of my improved skeleton elements;

Fi re 2 is a similar view of a column of. circu ar cross-section;

Figure 3 is a broken elevation of the skeleton metal element adaptable for use as a core for columns of various cross-sections;

Figure 4 is a similar elevation of this skeleton element after there have been added thereto some further metal elements adapting the same for use in a column of rectangular cross-section; v

Figure 5 is a view similar toFlgure 3 of this metal core after there have been added thereto some other metal elements adapting the same for use in a column of circular cross-section Figure 6 is a top plan view of the elements shown in Figure 4;

Figures 7 and 8 are transverse sections,

taken, respectively, in the planes indicated having the horizontal flange members 2 and 65 vertical flange members 1, the flanges 2 being formed with holes adapted to receive anchor bolts 3 for mounting the element upon any suitable main support 21. Similarly, I provide a hollow metal cap having the vertical flanges 4 and horizontal flanges 5, the latter of which are formed with bolt holes 6, adapting the cap for attachment to any suitable load which it is desired to carry upon the column. In the forms of invention shown, the base and cap are rectangular in cross-section, preferably s uare, and are secured together by means 0 vertical bars 7 preferably secured at their lower and upper ends to the corners of the vertical flanges 1 and 4 of the base and cap, respectively, and preferably exteriorl of the latter. The vertical bars 7 may e of any desired suitable shape and the cross-section of the base and cap may be other than rectangular, if 76 desired. My preferred method of securing together the vertical bars7 and the base and cap is by welding tlfi same together, preferably arc-welding, as indicated by the ordinals 9 and 10. I rigidly secure together 80 each adjacent pair of vertical bars 7 by means 'of tie-rods 8 provided throughout substantially the whole height of the metal core. Preferably, I provide one such tie rod 8 for each adjacent pair of bars 7 and string the same sinuously from the cap memher to the base member of the core, securing together the tie-rods 8 and the bars 7 at the points of contact, preferably by arc-welding the same together, as indicated by the ordi- 111.

Thus I have formed a core for thefin ished reenforced concrete column, such as indicated in Figure 3, which can be convenie ently shipped to the job and there utilized as a metal core for reenforced concrete columns of varyin cross-sections. I shall now describe by re erence to the accompanying drawings the means and methods of forming a reenforced concrete column of rectangular cross-section and one of circular cross-section through. the medium of the one type of core unit shown in Figure 3.

Referring particular y to Figures 1, 4, 6, 7 and 8, I shall describe the construction of a reenforced concrete column of rectangular cross-section.

To the tie bars 8 and exteriorly of the latter, preferably between the ends of each adjacent pair of tie-bars, and substantially throughout the height of the core I secure small rods 12, one rod 12 for each bar 8, the method of securing the same preferably being by means of arc-welding, such as indicated by the ordinal 13. Around the rectangle formed by the tie-rods 8 and the vertical rods 12, as plainly shown in Figures 1 and 7 I-string and secure expanded metal 14. 'I hus I have formed a special skeleton element for a rectangular column. The concrete is poured from the top in and around the metal elements hereinbefore described, as indicated by the ordinal 15, F i re 7, the expanded metal 14 forming a tie or the exterior plaster coat 15 which can be applied to the rough exterior of the concrete 15.

In the construction of a column of circular cross-section, referring particularly to Figures 2, 5, 9, 10 and 11, I first string a of wire'around the metal core shown lengths in igure 3 to form a series of verticallyspace rings 16 secured to the vertical bars I 7 and preferably connected thereto by means of arc-welding, as indicated by the ordinal 17. Around these rings 16 I string and secure expanded metal 18. Then, I pour the concrete 19 within and extending through the expanded metal 18, and apply an exterior laster coat 20, as hereinbe ore described wit reference to the construction of the rectangular column shown in Figure 1.

The design of the skeleton element hereinbefore described, shown in the accompanyin drawings and hereafter claimed, pernnts the obtaining of a column of maximum area with a minimum amount of steel. In fact, the same amount of steel in solid form would not be sufficient for acolumn of practicable size whatever.

I direct attention also to the ease of manufacture and rigidity of the metal core shown in Figure 3; to the fact that this core can be conveniently and safely shipped under usual transportation conditions; that the core is then readily adaptable for the addition thereto of suitable expanded metal holding means and suitable expanded metal to form columns of varying cross-sections; and that the concrete can be poured in and through and around the core without the necessity of an concrete pouring forms.

at I dam is:

1. A skeleton metal forced concrete columns comprising, a base member; vertical bars secured at their lower element for reen ends to said base member; a cap member secured to the upper ends of said bars; tierods connected to each adjacent pair of bars expanded metal retaining means connected to said bars; and expanded metal secured to said retaining means. 5 y

2. A skeleton metal element for reenforced concrete columns comprising, a vertical hollow metal base member; vertical bars secured at their lower ends to said base member; a hollow metal cap secured to the u per ends of said bars; tie-rods and expan ed metal retainin means connected to each adjacent pair of bars; and expanded metal surrounding said tie-rods and retaining means.

3. A skeleton. metal element for reenfcrced concrete columns comprising, a vertical hollow metal base member formed with means adapted to secure the element to and mount the same upon a main support; vertical bars secured at their lower ends to said base member; a hollow metal cap secured to the upper ends of said bars and formed with means adapting the same for attachment to a load; tie-rods and expanded metal retaining means connected to each adjacent pair of bars; and expanded metal surroundmg said tie-rods and retaining means.

4. A skeleton metal element for reenforccd concrete columns comprising, a rectangular vertical hollow metal base member formed with means adapted to secure the element to and mount the same upon a main support; vertical bars'secured, respectively, at their lower ends to, and exteriorly of, the corners of said base member; a hollow rectangular metal cap secured at its corners to, and within, the upper ends of said vertical bars and formed with means adapting the same for attachment to a load; sinuously strung tierods, and expanded metal retaining means secured to each adjacent pair of vertical bars; and expanded metal surrounding said tie-rods and retaining means.

5. A skeleton metal element for reenforced concrete columns comprising, a rectangular verticalhollow metal base member; vertical bars welded, respectively, at their lower ends to, and exteriorly of, the corners of said base member; a hollow rectangular metal cap welded at its corners'to, and within, the upper ends of said vertical bars; sinuously,

strung tie-rods, and expanded metal retainelement; a plurality of spaced metal rings upper ends of said vertical bars; tie-rods secured to and surrounding said vertical sinuously strung from top to bottom of each bars; and expanded metal shaped to and suradjacent pair of vertical bars and welded rounding said rings. thereto at the points of contact; a plurality I I 7. Askeleton metal element for reenforced of vertically-spaced metal rin welded to concrete columns com rising, a rectangular and surrounding said vertical ars; and exvertical hollow metal ase member; vertical panded metal shaped to and surrounding bars welded, respectively, at theirlower ends said rings. to, and exteriorly of, the corners of said base Signed by me this 28 day of Dec, 1925. 10 member; a hollow rectangular metal cap I welded at its corners to, and within, the STANLEY MACOMBER. 

